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(Referência obtida automaticamente do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Coffee industry waste-derived biochar: characterization and agricultural use evaluation according to Brazilian legislation

Texto completo
Autor(es):
Ruan Carnier [1] ; Aline Renee Coscione [2] ; Douglas Delaqua [3] ; Cleide Aparecida de Abreu [4]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] Instituto Agronômico. Programa de Pós-Graduação em Agricultura Tropical e Subtropical. Gestão de Recursos Agroambientais - Brasil
[2] Instituto Agronômico. Centro de Solos e Recursos Ambientais - Brasil
[3] Instituto Agronômico. Programa de Pós-Graduação em Agricultura Tropical e Subtropical. Gestão de Recursos Agroambientais - Brasil
[4] Instituto Agronômico. Centro de Solos e Recursos Ambientais - Brasil
Número total de Afiliações: 4
Tipo de documento: Artigo Científico
Fonte: Bragantia; v. 80, 2021-12-06.
Resumo

ABSTRACT The agricultural use of biochar has been the focus of much research in the last decade due to the improvement of soil chemical, physical, and biological attributes. Nonetheless, Brazil still has no specific legislation for biochar, limiting its agricultural use. The objective of the present work is to evaluate the use of biochar produced from spent coffee grounds (SCG) and coffee parchment (CP) by slow pyrolysis at 700 °C according to the existing framework of the Brazilian Ministry of Agriculture, Livestock, and Food Supply (MAPA) legislation for organic fertilizer, soil conditioner or plant substrate. Biochar was characterized according to normative instructions No. 17, 31, 61, 7, 5 and 35. Although not required by the addressed legislation, the semitotal content of macro- and micronutrients was also determined. While CP biochar could be used as an organic fertilizer or plant substrate, SCG biochar, due to its higher Ni content and lower than required cation exchange capacity (CEC), did not meet MAPA legislation criteria to allow for its agricultural use. Future regulations can be based on the current standards, and structural attributes, such as total C content, particle size distribution, and complete macro- and micronutrient determination should be included. Further research may also indicate the viability of biochar use as a soil conditioner based on a more representative set of biomasses with a higher CEC. These considerations will help to take advantage of the benefits of biochar to soil, contributing to a circular economy, which is still at a difficult stage in Brazil. (AU)

Processo FAPESP: 16/19368-6 - Biocarvão para melhoria da qualidade de solos contaminados com metais
Beneficiário:Cleide Aparecida de Abreu
Modalidade de apoio: Auxílio à Pesquisa - Regular